Many people have high hopes
for ethanol made from corn — that it will prevent future gasoline shortages, prevent global warming, be a wonderful investment, and improve the income of farmers, among other things.
The Scientific American reports that roughly 40 percent of today's corn crop is used
for ethanol made from corn, which is added to gasoline.
Not exact matches
And Brazil, arguably the world leader in
making ethanol from crops, has been turning sugar cane into fuel
for nearly three decades — a process that is 30 % cheaper than
corn - based production in the U.S.
That method could
make a difference in cellulosic biofuel plants, which produce
ethanol from waste products —
corn husks and cobs — rather than edible kernels, a major advance in addressing the tradeoff of using agricultural land to grow
corn for fuel rather than
for food.
Corn ethanol made from irrigated crops,
for example, can use more than 1,000 times more water than oil refining, according to calculations by Sandia National Laboratory.
«
Ethanol made from miscanthus would need a much smaller carbon price to make it desirable to produce and for consumers to purchase as compared to ethanol from switchgrass and corn
Ethanol made from miscanthus would need a much smaller carbon price to
make it desirable to produce and
for consumers to purchase as compared to
ethanol from switchgrass and corn
ethanol from switchgrass and
corn stover.
Speaking of a bio-based economy, did the push
for biofuels like
ethanol from corn make farming's problems worse?
I don't see how our subsidies
for making ethanol from corn,
for example, spill over to the production of high fructose
corn syrup.
The company they've bought into has a novel approach to producing
ethanol that could use virtually any carbon source and would decouple that fuel
from corn production, potentially
making it possible
for cities to produce their own transportation fuel using their own MSW, eliminating some of the need
for landfilling and the associated long - tail methane and CO2 releases
from same.
For years we've been promised the next generation of biofuels,
made from waste cellulose, but we have yet to see it replace
corn ethanol.
David Pimentel, a professor of ecology at Cornell University who has been studying grain alcohol
for 20 years, and Tad Patzek, an engineering professor at the University of California, Berkeley, co-wrote a recent report that estimates that
making ethanol from corn requires 29 percent more fossil energy than the
ethanol fuel itself actually contains.
Just growing
corn and preserving it in a salt mine forever whilst
making gasoline
from coal or natural gas will even capture far more carbon than using it
for ethanol does.
For instance, how is changing all our oil dependency to
ethanol made from corn going to solve our crisis.
If someone wants to buy field
corn (that's what they
make ethanol from,) they can buy All They Want, today,
for $ 0.06 / lb.
I was reminded of Canute's story when considering the latest Environmental Protection Agency numbers
for cellulosic
ethanol — a hoped -
for alternative to
corn - based
ethanol made from switchgrass and wood chips.
(
For context, the price of a gallon of processed
ethanol made from corn is now $ 2.40 a gallon.)
By playing up jingoistic fears of «energy dependence,» King
Corn has convinced the Congress that ethanol, a motor fuel distilled from corn, is a national security imperative, despite the fact that it increases gas prices, it's awful for the environment, it contributes to asthma, and it makes food costl
Corn has convinced the Congress that
ethanol, a motor fuel distilled
from corn, is a national security imperative, despite the fact that it increases gas prices, it's awful for the environment, it contributes to asthma, and it makes food costl
corn, is a national security imperative, despite the fact that it increases gas prices, it's awful
for the environment, it contributes to asthma, and it
makes food costlier.
For almost a decade, the Senate Ag Committee has been the primary benefactor of
ethanol, a fuel
made from corn.
(Note that the study did not look at first generation biofuels
made from tropical crops like sugarcane or sweet sorghum which reduce emissions far more than
corn ethanol;
for sugarcane
ethanol, the reduction is as large as that of cellulosic biofuels, earlier post.)